<template>
  <div class="permission-container">
    <div class="app-container">
      <!-- 表格 -->
      <el-card>
        <div style="text-align: right; margin-bottom: 20px">
          <el-button type="primary" size="small" @click="hAdd(1,'0')">添加权限</el-button>
        </div>
        <el-table :data="list" border row-key="id">
          <el-table-column label="名称" prop="name" />
          <el-table-column label="标识" prop="code" />
          <el-table-column label="描述" prop="description" />
          <el-table-column label="操作">
            <template slot-scope="scope">
              <el-button v-if="scope.row.type === 1" type="text" @click="hAdd(2,scope.row.id)">添加</el-button>
              <el-button type="text" @click="hEdit(scope.row.id)">编辑</el-button>
              <el-button type="text" @click="hDel(scope.row.id)">删除</el-button>
            </template>
          </el-table-column>
        </el-table>
      </el-card>
    </div>
    <!-- 弹层 -->
    <el-dialog
      :visible.sync="showDialog"
      :close-on-click-modal="false"
      :close-on-press-escape="false"
      :title="isEdit ? '编辑' : '添加'"
      @close="resetForm"
    >
      <!-- 表单内容 -->
      <el-form ref="formData" :model="formData" label-width="100px" :rules="rules">
        <el-form-item label="权限名称" prop="name">
          <el-input v-model="formData.name" />
        </el-form-item>
        <el-form-item label="权限标识" prop="code">
          <el-input v-model="formData.code" />
        </el-form-item>
        <el-form-item label="权限描述">
          <el-input v-model="formData.description" />
        </el-form-item>
        <el-form-item label="权限启用">
          <el-switch
            v-model="formData.enVisible"
            active-text="启用"
            active-value="1"
            inactive-text="不启用"
            inactive-value="0"
          />
        </el-form-item>
      </el-form>

      <template #footer>
        <div style="text-align: right;">
          <el-button @click="showDialog = false">取消</el-button>
          <el-button type="primary" @click="hSubmit">确定</el-button>
        </div>
      </template>
    </el-dialog>
  </div>
</template>

<script>
import { getPermissionList, addPermission, delPermission, getPermissionDetail, updatePermission } from '@/api/permisson'
import { tranListToTreeData } from '@/utils'
export default {
  name: 'Permissions',

  data() {
    const validCode = (rule, value, callback) => {
      // 添加时的校验：code不能重复
      let existCodeList = this.originList
      if (this.isEdit) {
        // 编辑时的校验: code能取自己
        existCodeList = this.originList.filter(item => item.id !== this.formData.id)
      }
      existCodeList.map(it => it.code).includes(value)
        ? callback(new Error(value + '已经占用'))
        : callback()
    }
    const validName = (rule, value, callback) => {
      // 添加时的校验： 名字不能取子元素的名字
      let existNameList = this.originList.filter(item => item.pid === this.formData.pid)
      if (this.isEdit) {
        // 编辑时的校验： 名字不能取兄弟（排除自己）的名字
        existNameList = this.originList.filter(item => item.pid === this.formData.pid && item.id !== this.formData.id)
      }
      existNameList.map(it => it.name).includes(value)
        ? callback(new Error(value + '已经占用'))
        : callback()
    }

    return {
      list: [],
      showDialog: false, // 显示弹层
      isEdit: false, // 编辑状态
      formData: {
        name: '', // 名称
        code: '', // 权限标识
        description: '', // 描述
        enVisible: '0', // 开启
        pid: '', // 添加到哪个节点下
        type: '' // 类型

      },
      originList: [], // 做校验时需要
      rules: {
        name: [{ required: true, message: '权限名称不能为空', trigger: 'blur' },
          { validator: validName, trigger: 'blur' }
        ],
        code: [{ required: true, message: '权限标识不能为空', trigger: 'blur' },
          { validator: validCode, trigger: 'blur' }
        ]
      }
    }
  },
  created() {
    this.loadgetPermissionList()
  },
  methods: {
    // 添加
    async doAdd() {
      try {
        const res = await addPermission(this.formData)
        console.log('添加信息', res)
        // 关闭弹层
        this.showDialog = false
        // 更新数据
        this.loadgetPermissionList()
      } catch (err) {
        console.log(err)
      }
    },
    // 删除
    async doDel(id) {
      try {
        const res = await delPermission(id)
        console.log('删除信息', res)
        // 更新数据
        this.loadgetPermissionList()
        // 提示
        this.$message.success('删除成功')
      } catch (err) {
        // console.log(err)
        this.$message.error('删除失败' + err)
      }
    },
    // 编辑
    async hEdit(id) {
      try {
        const res = await getPermissionDetail(id)
        // 数据回填
        this.formData = res.data
        // 记录编辑状态
        this.isEdit = true
        // 显示弹层
        this.showDialog = true
      } catch (err) {
        console.log(err)
      }
    },
    // 编辑保存
    async doEdit() {
      try {
        const res = await updatePermission(this.formData)
        console.log('编辑保存', res)
        // 提示信息
        this.$message.success('修改成功')
        // 关闭弹层
        this.showDialog = false
        // 更新数据
        this.loadgetPermissionList()
      } catch (err) {
        console.log(err)
        this.$message.error('修改失败', err)
      }
    },
    hDel(id) {
      this.$confirm('确定要删除吗？').then(() => {
        this.doDel(id)
      }).catch(() => {

      })
    },
    hSubmit() {
      this.$refs.formData.validate(valid => {
        if (!valid) return
        this.isEdit ? this.doEdit() : this.doAdd()
      })
    },
    hAdd(type, id) {
      // 显示弹层
      this.showDialog = true
      // 记录当前最新数据
      this.formData.type = type
      this.formData.pid = id
      // 记录添加状态
      this.isEdit = false
    },
    // 获取所有信息
    async loadgetPermissionList() {
      try {
        const res = await getPermissionList()
        // console.log('获取所有信息', res)
        this.originList = res.data.map(({ id, pid, name, code }) => ({ id, pid, name: name.trim(), code }))
        // 转换为树状图
        this.list = tranListToTreeData(res.data)
      } catch (err) {
        console.log(err)
      }
    },
    // 表单close事件
    resetForm() {
      // 关闭弹层
      this.showDialog = false
      // 清空表单数据
      this.formData = {
        name: '', // 名称
        code: '', // 权限标识
        description: '', // 描述
        enVisible: '0', // 开启
        pid: '', // 添加到哪个节点下
        type: '' // 类型
      }
      // 清空表单校验信息
      this.$refs.formData.resetFields()
    }

  }

}
</script>

<style lang="scss" scoped>
.permissions {
  &-container {
    margin: 30px;
  }
  &-text {
    color: red;
    font-size: 30px;
    line-height: 46px;
  }
}
</style>
